The skill you are talking about is called panzer tactican, and I agree it is way too easy to use, as it basically gives you a big rng chance to get away for just some muni
The whole penetration mechanic as a whole could use a rework, panthers armor is not that big of a factor anymore with mediums being buffed since there is no side armor nor balanced penetration falloff based on distance
Flame nades should have a delay, they allow you to win almost all engagements just because of the 20 initial detonation damage which you can't really dodge.
USF FRP is not even that useful on 1v1 maps, most time you will send your major to cap or just die since he is useless otherwise.
The only problem is that OKW has no preqrequisite for the FRP. USF needs to tech to T4 which costs a lot of fuel, while all okw has to do is to place the med truck. Make it a t4 unlock or something